5217642261 has 24 divisors (see below), whose sum is σ = 8593767000. Its totient is φ = 3021981696.

The previous prime is 5217642257. The next prime is 5217642281. The reversal of 5217642261 is 1622467125.

It is a happy number.

5217642261 is a `hidden beast` number, since 5 + 2 + 1 + 7 + 642 + 2 + 6 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 324900 + 5217317361 = 570^2 + 72231^2 .

It is not a de Polignac number, because 5217642261 - 2² = 5217642257 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5217642211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1309636 + ... + 1313613.

It is an arithmetic number, because the mean of its divisors is an integer number (358073625).

Almost surely, 2^5217642261 is an apocalyptic number.

5217642261 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

5217642261 is a deficient number, since it is larger than the sum of its proper divisors (3376124739).

5217642261 is a wasteful number, since it uses less digits than its factorization.

5217642261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2623285 (or 2623282 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 5217642261 is about 72233.2489993355. The cubic root of 5217642261 is about 1734.4352832185.

The spelling of 5217642261 in words is "five billion, two hundred seventeen million, six hundred forty-two thousand, two hundred sixty-one".